whats his redish brown sunstance

[buckey]

Hi im new to this hobby and i just started a 50 gallon tank. its about a month old now and the bottom of the tank is absolutely covered in this redish colored substance. any info on this sunbstance and how to reduce it would be appreciated. thanks for your time

 

[twoods71]

Welcome to the board.
Being that your tank is new the redish brown substance may be diatoms and if so is a normal part of a tank cycle.

 

[buckey]

Uhmm what are diatoms and are they in any way harmful?